<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        *{margin:0;padding:0}
        img{
            display:block;
            margin-left: auto;margin-right: auto;
            height:auto;
            max-width: 100%;
           }
    </style>
</head>
<body>
<img src="images/down.jpg" />
</body>
</html>